A suspected double bomber on the FBI's most wanted list who vanished for 21 years is due in court this week to decide if he will be sent back to the United States to face trial.
The FBI believe Daniel Andreas San Diego has links to animal rights extremist groups and is their prime suspect for a series of bombings in the San Francisco Bay Area in 2003.
Former FBI agents have said there were 'missed opportunities' to arrest the 47-year-old before he vanished and claim they found a suspected 'bomb-making factory' in his abandoned car after what detectives called a 65-mile (104km) rush-hour chase in California.
Mr San Diego was found 5,000 miles (8,000km) away in a cottage in north Wales last year.
Mr San Diego, who had a $250,000 (£199,000) bounty on his head, faces a five-day extradition hearing at Westminster Magistrates Court in London on Monday to find out if the UK will hand him over to the United States to answer a federal arrest warrant.
He has been indicted by US prosecutors for maliciously damaging and destroying by means of an explosive after two separate attacks in 2003.
Animal rights extremist group Revolutionary Cells - Animal Liberation Brigade claimed responsibility for the attacks on firms they believed had links with organisations that tested products on animals.
Former FBI Special Agent David Smith was part of a special operations group that had been watching Mr San Diego.
He was remarkable by being unremarkable, there was nothing to suggest this guy was starting to look violent. We never got any indication he was aware of us.
The FBI felt it had enough intelligence to suggest Mr San Diego was its prime suspect and thought it was him that planted the devices that detonated a month apart.
But supervisory special agent Andrew Black, part of the FBI's counter-terrorism media team, recalled that the decision was made between arresting him or developing more information to trace more of the group he was linked to.
His capture comes after years of silence from the FBI, who had believed he possibly fled to South America. The FBI Director stated that Daniel San Diego's arrest shows that 'no matter how long it takes, the FBI will find you and hold you accountable.'
San Diego is currently detained in Belmarsh Prison and has not commented on his situation.
